Pump



Jan, 25,' 1944. w. E. GEISSLER I 2,340,265

PUMP

Filed Oct. 17. 1942 v 2 Sheets-Sheet 1 ATTORNEY J n- 25, 1944- w. 5:. GEISSLER 2,340,265

PUMP

Filed Oct. 17. 1942 2 Sheets-Sheet 2 INVENTOR l V/Z Z /4/V 6'. 62755119? BY ovum, MM

ATTORNEY Patented Jan. 25, 1944 Fl CE;

William E. Geis slier, ossining, LN. assignoriio The D011: Company, New York, N.- Y., a corporation of Delaware Application October 17, 1942, Serial "No. 162;3'27

3 Claims. (01. lo -1'28) This invention relates to pumps of the reciprocatingplunger type, especially that kind that have the capacity of pumping'aconstant volume. Such pumps are used for instance in pumping inorganic metallurgical pulps and slurries as -v'velllas organic muds such as those produced in the manufacture of sugar. This type of pump israther well known in the art and is represented by the Dorrco Pump such' as is made by The Dorr Company, Inc., of 5'10 Lexington Avenue, New York, N. Y. This pump'is characterized by having an annular rubber diaphragm that is fixed to the stationary pump casing at its periphery and to the reciprocable connecting rod of the pump'at' its inner edge, so that reciprocation of .the' connecting rod flexes and unfiexes the rubberdiaphragm to'cause pumping action. With the'corni'ng of war and the restrictions on the use and export of rubber articles, a substitute therefor is to be sought, so this invention comprises' 'thesubstitutionof metallic parts for the rubber diaphragm insai'd' pumps, and especially "as mplacement parts for such existing pumps.

More particularly, this invention proposes to substitutea fixed cylinder for attachment to that part of the pump casing to which the periphery of the rubber diaphragm was heretofore fixed, and to provide a plunger piston or pistonlike plate for attachment to the reciprocable connecting rod to which the rubber diaphragm is usually connected at its inner edge. plunger, piston or piston plate is characterized by having its edge formed like a flange whose outer edge or skirt is curved arcuately. The purpose of this is to permit the piston to rock or tilt within its cylinder while still maintaining a tight fit thereagainst during its entire period of reciprocation.

With other objects and features of invention in view, the invention is illustrated in the accompanying drawings, in which Figure 1 shows an end view with parts shown in dotted lines, of a pump embodying this invention; Fig. 2 shows a front view thereof; fig. 3 shows an isometric view of particular features of the invention; and Fig. i is a vertical sectional partial view of a pump embodying this invention; and Fig. 5 shows in perspective, with a section thereof broken away, a modified form of a piston plunger ring that may be used.

Similar reference numerals represent similar parts throughout the drawings in which l0 designates a pump casing mounted upon the lower portion of a frame ll. Upon the upper portion of said frame, a driving means is mounted which This nul'ar attachment .flange'li andan a valve cap idalong the annular engage through the inlet passage.

"I B by means of the lindrical member 2 i, that is, 'of, and is formed with a peripheral will be hereinafter fully described. The pump casing is formed'at itslower end, with an anv inlet passage i3 extending therethrough. A ledge l4 is formed at the upper end ofinlet passage l3 and carries thereon a valveseat"orfgasket 15 which engages V edge l 1. Said valve cap is formed with fins orguides I8 which The wall of the pump casing extends upwardly and outwardly to form an annular shoulder I 9 'andfa; second ledge 19 and a wider opening 26 at itstop. V

A cylindrical member 2 I, formed "with an "annular flange 22,-is attached to the pump casing bolts-'23 engaging the flange ZZ aridshouIder lfi'to be secured theretoby-the cap nuts 2d. Interp'os'ed between the fiange '22 and the annular shoulder I9, is a gasket orwasher 25, which usually can be made from the rubber diaphragm replaced by this invention.

A pluhgerpiston 25, having a central opening or'pa ssage z'i, engages within the aforesaid cywith the base therearc'uatesurface at 28 to form a tight contact with the side of the cylinder during a tilting movement imparted to the said plunger piston during its up eration as is hereinafter explained. This plunger piston is mounted upon the lower ends of legs 29 of a yoke member 39, and is securely attached thereto by the bolts 3! and cap nuts 32.

A washer 33 is secured around the edge of the aforesaid opening 27 and forms a seat for the valve 34 which is provided with fins or guides 35 adapted to engage through the opening 21.

This yoke member 39 is securely attached to a rocking arm or rod 36 which terminates, at its upper end, in a cam yoke 31 which in turn engages a cam 38 eccentrically mounted upon a. shaft 39 of a driving unit 40. This said shaft extends through and is carried by bearing blocks 4!. A suitable clutch 42 may be provided. The driving unit and bearing blocks are securely attached to the upper portion of the frame H.

A discharging lip 43 may be formed at one side of the said pump casing. Attached to the rod 36 by means of a set screw Ml is a splash guard 45.

In operation, the plunger piston 26 is given a rocking reciprocating motion within the cylinder 2! by means of the attached rod 36 which is in turn actuated by its cam connection 31 with the eccentric cam 38 upon the shaft 39. Rotary motion is imparted to the shaft by its connected driving unit 40. During the reciprocating movement of the connecting rod, an oscillating movement will be imparted to it and this movement will in turn give to the plunger piston during its travel a tilting or rocking motion within the cylinder 2|. In order, therefore, to prevent binding and to assure a tight contact of the plunger piston within the cylinder base, the plunger piston is formed with an arcuate contacting surface, as shown.

As heretofore set forth, the invention is designed to act as an interchangeable replacement for a rubber diaphragm which was formerly used in attachment to the lower part of the yoke member 29 and held in place upon the annular shoulder 19 on ledge l9.- The replacement unit' therefore comprises the cylinder 2| which is attached by the laterally extending flange 22, and the arcuate piston operating therein, both of which are shown in perspective in Fig. 3.

A modified form of piston plunger ring is shown in Fig. 5. It comprises a structure wherein a [ring 46 of leather or other resilient or flexible material is held between clamping rings to complete a pistonplunger having a tight contact withthesurrounding cylindrical wall. The rings just referredto have holes 49 for receiving the bolts 3| having cap nuts 32. These bolts serve 'to hold the plunger piston ring of this Fig. 5

securely in position upon the legs 29 of the aforesaid. yoke member 30 and at the same time they accomplish a. firm clamping of the ring member 46 between theclamping rings 41 and 48 as the bolts draw the piston plunger ring tightly into position upon said yoke member. The rings 41 and 48 serve to sufficiently compress the ring member 46 so as to forcibly cause the outer periphery of the latter to bulge to form an arcuate marginal surface 50 shown in the drawings. The arcuate surface and the resiliency of the ring 46 permit and insure constant contact with the inside surface or cylindrical wall 2| during the rocking motion imparted to the plunger piston by the connected reciprocally moving and oscillating rod 3|. 1

, 7 Other modifications may be embodied in this invention without departing from the spirit and scope thereof.

1 claim:

1. In a reciprocable plunger pump having a 6 pump body having an inlet, an outlet, and being chambered to provide a flow passage from the inlet to the outlet, as well as being provided with an intake valve, a discharge lip and an annular shoulder below the lip; a frame for the i0 pump, driving means supported therefrom, an

eccentric driven by the driving means, tiltable plunger means, a discharge Valve carried thereby and connecting rod means connecting said plunger to said eccentric; the arrangement character- ;15 izedby anopen cylinder having a flange on its exterior, means for securing said flange to said 'shoulder'and an arcuate face on said plunger means coacting with the interior of said cylinder.

2. In a reciprocable plunger pump having a pump body having an inlet, an outlet, and bein chambered to provide a flow passage from the inlet to the outlet, as well as being-provided with an 'intake'valve and an annular shoulder; a frame for the pump, driving means supported therefrom,

i an eccentric driven-by the driving means, a tiltable reciprocable yoke member, a discharge valve carried thereby, connecting rod means connecting the yoke member to the eccentric, an open cylinder fixedly supported from said shoulder, an an- :;0 nular plunger carried by the yoke member, and

an arcuate face onwthe plunger for tiltably and reciprocably coacting with the bore of the cylinder.

- '3. A sub-combination of cooperative parts for :25 a reciprocableplunger-pump, comprising an open cylinder, a flange integrally carried exteriorly thereof intermediate of its extremities, said flange having bolt holes therethrough, and an annular plunger adapted for rockable reciprocation in said 40 cylinder having its edge portion provided with an arcuate face adapted for contact with the bore of the cylinder during such rockable reciprocation, and a valve seat carried by the plunger.

WILLIAM E. GEISSLER. 

